The Harhoog is an extended dolmen, a rectangular megalithic tomb from the Funnelbeaker culture, located near Keitum on the island of Sylt in Schleswig-Holstein, Germany. Discovered in 1925, it was moved to the present site in 1954 when a new airport was developed.
The megalithic Harhoog burial chambers were originally located near the mud-flats between Keitum and Tinnum. They were moved to the area near the swimming pool at Tipkenhoog on the coast in 1954 when the Sylt airport was under development. The chambers contain parallel and transverse sections.
The graves at Harhoog are dated to the late Stone Age and belonged to ancient settlements of the island's Funnelbeaker culture, probably around 3000 BC. There were once approximately 600 of them but today about half of them still exist.
The megalithic tombs are built with large, rough stone slabs (one or more) which are arranged in different patterns. Harhoog Dolmen is an extended dolmen, under Ernst Sprockhoff's six-category classification; the other five types are simple dolmen, great dolmen, passage grave, long barrows (without a burial chamber) and cist.
- Ernst Sprockhoff. Atlas der Megalithgräber Deutschlands - Schleswig-Holstein. Rudolf Habelt Verlag, Bonn, 1966.
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